package com.wl.blog.web.admin;

import com.wl.blog.po.Type;
import com.wl.blog.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TypeController {

    @Autowired
    private TypeService typeService;

    @GetMapping("/types")
    public String types(@PageableDefault(size = 6, sort = {"id"},
            direction = Sort.Direction.DESC) Pageable pageable, Model model) {

        model.addAttribute("page", typeService.listType(pageable));
        return "admin/typesManager";
    }

    @GetMapping("/types/input")
    public String typesInput(Model model)
    {
        //前端需获取type的name属性
        model.addAttribute("type", new Type());
        return "admin/typesInput";
    }

    @PostMapping("/types")
    public String addType(@Valid Type type, BindingResult result, RedirectAttributes attributes) {
       Type type1 = typeService.getTypeByName(type.getName());
        if(type1 != null) {
            //BindingResult 添加自定义错误信息
            result.rejectValue("name","nameError","已存在分类不能重复添加");
        }

        //后端校验结果返回,与实体类上@NotBlank(message = "分类名称不能为空")结合使用
        if (result.hasErrors()) {
            return "admin/typesInput";
        }

        Type t = typeService.saveType(type);
        if (t == null){
            attributes.addFlashAttribute("message","新增失败");
        } else {
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/types";
    }

    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("type", typeService.getType(id));
        return "admin/typesInput";
    }

    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result,@PathVariable Long id, RedirectAttributes attributes) {
        Type type1 = typeService.getTypeByName(type.getName());
        if(type1 != null) {
            //BindingResult 添加自定义错误信息
            result.rejectValue("name","nameError","已存在分类不能重复添加");
        }

        //后端校验结果返回,与实体类上@NotBlank(message = "分类名称不能为空")结合使用
        if (result.hasErrors()) {
            return "admin/typesInput";
        }

        Type t = typeService.updateType(id,type);
        if (t == null){
            attributes.addFlashAttribute("message","更新失败");
        } else {
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/types";
    }


    @GetMapping("/types/{id}/delete")
    public String delType(@PathVariable Long id, RedirectAttributes attributes) {
        typeService.deleteType(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/types";
    }

}
